Austrian silver and enamel egg form verge Circa 1800-1820

Egg form keywound watch with concealed dial by Strigsner
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An Austrian silver and enamel egg form keywound verge watch with concealed dial, circa 1800-1820. Mechanical gilt finished full plate verge movement, chain fusée, pierced and engrave balance cock, silvered regulator dial. White enamel dial with Roman numerals, all concealed within a hinged egg form case with engraved scroll and floral openwork overlay, white champlevé enamel band reading Dieu Vous Benit (May God Bless You). Movement signed, case stamped LP.
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Diameter: 4.30 mm
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Overall lenght: 57 mm
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Signed: Strigsner à Wien